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Table 2 Reliability and Structure of the Weekly DAILY EATS item and EDI Composite Scores

From: Psychometric evaluation of the DAILY EATS questionnaire in individuals living with obesity

DAILY EATS

Cronbach’s Alpha

Test-retest reliability

ICC (95% CI), na

One-factor EFA loading

Study 1/Study 2

Study 1

Study 2

Study 1/Study 2

Item 1. Average hunger

0.94/0.94

0.80 (0.62–0.90), 28

0.71 (0.54–0.82), 55

0.93*/0.95*

Item 2. Worst hunger

0.94/0.95

0.79 (0.60–0.90), 28

0.71 (0.53–0.83), 55

0.97*/0.95*

Item 3. Appetite

0.93/0.94

0.76 (0.55–0.88), 30

0.60 (0.39–0.74), 55

0.92*/0.91*

Item 4. Cravings

0.93/0.95

0.84 (0.66–0.93), 23

0.72 (0.56–0.83), 52

0.73*/0.76*

Item 5. Satiety

0.95/0.95

0.67 (0.36–0.85), 22

0.58 (0.41–0.72), 74

0.21*/0.22*

EDI

0.90/0.91

0.88 (0.76–0.94), 28

0.75 (0.54–0.86), 55

–

  1. The EDI is computed as the mean of Worst Hunger (Item 2), Appetite (Item 3), and Cravings (Item 4) weekly average scores
  2. CI Confidence interval, EDI Eating Drivers Index, EFA Exploratory factor analysis, EOT End of treatment, ICC Intraclass Correlation Coefficient, PGIS Patient Global Impression of Severity, SE Standard error, T2DM Type 2 diabetes mellitus
  3. aThe Study 1 data used were Week 15 (test) and Week 26/EOT (retest) for the subgroup of patients with no PGIS change; the Study 2 data used were baseline (test) and Week 12/EOT (retest) for the subgroup of patients with no PGIS change
  4. * P <  0.05 for H0: loading = 0
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